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<p>Al 6063 is a heat-treatable alloy from the Al-Mg-Si series, which is widely applied in various fields due to exceptional corrosion resistance characteristics formability, and a high-quality surface finish. To enhance the mechanical characteristics of Al 6063, silicon carbide and fly ash particles were added using the stir casting approach in this work. Four hybrid composite samples were prepared in which the fly ash constant was 5 wt% and the SiC concentration changed as 2.5 wt%, 5 wt%, 7.5 wt% and 10 wt%. Al6063/ 5wt% fly ash/ 7.5wt% SiC composite showed improved mechanical properties. The ultimate tensile strength and the yield strength were obtained as 35.76&#xa0;N/mm² and 25.35&#xa0;N/mm², maximum shear force of 8.2 kN, resulting in a strength of 52.20&#xa0;N/mm². The hardness test samples showed that the same sample had the highest Rockwell hardness of 17.85 HRB and Brinell Hardness Number of 419.33 BHN. Additionally, the impact test results showed that the same sample achieved the maximum Charpy test and Izod test impact strength of 0.30&#xa0;J/mm² and 0.38&#xa0;J/mm², respectively. The inclusion of 7.5 wt% SiC with 5 wt% fly ash drastically improved the mechanical and impact properties of the Al 6063 alloy, making it attractive for structural and automotive purposes.</p>

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Development of stir-cast al 6063 hybrid composites with 5 Wt.% fly ash and varying SiC reinforcements for improved mechanical and impact properties

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Bhiksha Gugulothu,
  • R. Sanjeev Kumar,
  • P. S. Satheesh Kumar,
  • S. Karthikeyan,
  • Deepak Gupta

摘要

Al 6063 is a heat-treatable alloy from the Al-Mg-Si series, which is widely applied in various fields due to exceptional corrosion resistance characteristics formability, and a high-quality surface finish. To enhance the mechanical characteristics of Al 6063, silicon carbide and fly ash particles were added using the stir casting approach in this work. Four hybrid composite samples were prepared in which the fly ash constant was 5 wt% and the SiC concentration changed as 2.5 wt%, 5 wt%, 7.5 wt% and 10 wt%. Al6063/ 5wt% fly ash/ 7.5wt% SiC composite showed improved mechanical properties. The ultimate tensile strength and the yield strength were obtained as 35.76 N/mm² and 25.35 N/mm², maximum shear force of 8.2 kN, resulting in a strength of 52.20 N/mm². The hardness test samples showed that the same sample had the highest Rockwell hardness of 17.85 HRB and Brinell Hardness Number of 419.33 BHN. Additionally, the impact test results showed that the same sample achieved the maximum Charpy test and Izod test impact strength of 0.30 J/mm² and 0.38 J/mm², respectively. The inclusion of 7.5 wt% SiC with 5 wt% fly ash drastically improved the mechanical and impact properties of the Al 6063 alloy, making it attractive for structural and automotive purposes.